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Custom-lower FRAMEADDR. Patch by Sasa Stankovic.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132444 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka 2011-06-02 00:24:44 +00:00
parent 7c6a5a2c39
commit 2e591477af
3 changed files with 17 additions and 1 deletions
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3
lib/Target/Mips/MipsFrameLowering.cpp
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@ -84,7 +84,8 @@ using namespace llvm;
// if frame pointer elimination is disabled.
bool MipsFrameLowering::hasFP(const MachineFunction &MF) const {
const MachineFrameInfo *MFI = MF.getFrameInfo();
return DisableFramePointerElim(MF) || MFI->hasVarSizedObjects();
return DisableFramePointerElim(MF) || MFI->hasVarSizedObjects()
|| MFI->isFrameAddressTaken();
}
bool MipsFrameLowering::targetHandlesStackFrameRounding() const {

14
lib/Target/Mips/MipsISelLowering.cpp
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@ -523,6 +523,7 @@ LowerOperation(SDValue Op, SelectionDAG &DAG) const
case ISD::SELECT: return LowerSELECT(Op, DAG);
case ISD::VASTART: return LowerVASTART(Op, DAG);
case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
}
return SDValue();
}
@ -1551,6 +1552,19 @@ SDValue MipsTargetLowering::LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG)
return LowerFCOPYSIGN64(Op, DAG, Subtarget->isLittle());
}
SDValue MipsTargetLowering::
LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
assert((Depth == 0) && "Frame address can only be determined for current frame.");
MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
MFI->setFrameAddressIsTaken(true);
EVT VT = Op.getValueType();
DebugLoc dl = Op.getDebugLoc();
SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, Mips::FP, VT);
return FrameAddr;
}
//===----------------------------------------------------------------------===//
// Calling Convention Implementation
//===----------------------------------------------------------------------===//

1
lib/Target/Mips/MipsISelLowering.h
View File

@ -125,6 +125,7 @@ namespace llvm {
SDValue LowerSELECT(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const;
virtual SDValue
LowerFormalArguments(SDValue Chain,